Andrew Gabriel wrote:

They're both horribly inefficient at general lighting, and
won't meet the building regs requirements for lighting
energy efficiency if they apply to your extension (I can't
remember off-hand when they kick in on a building project).

The building regs may require instalation of a certain number of "low
energy" light fittings as a part of the build. The number required being
dictated by the number of habitable rooms you are adding.

Note however that these fittings do not have to be the only fittings
used... so you can make your ligting as energy inefficent as you want,
so long as somewhere you can point to the required number of LE fittings
to satisfy the regs. Even if the LE fittings never get used!

--
Cheers,

John.

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